Mounting for inverted incandescent mantles



Oct. 26, 1948. c. w. DAVIS Z45Z,438

MOUNTING FOR INVERTED INCANDESCENT MANTLES Filed Dec. 17, 1945 2 Shets-Sheet 1 INVEN TOR. C0272 n/vo W 04 W5.

ct. 26, 1948. c. w. DAVIS 2,452,43

MOUNTING FOR INVERTED INCANDESCENT MANTLES I Filed Dec 17, 1 45 2 Sheets-Sheet 2 INVENTOR. 60,4272. AND W 04 W5,

ATTORNEY Patented Oct. 26, 1948 MOUNTING FOR INVERTED INCANDESCENT MANTLES Cortland W. Davis, Summitville, Ind., assignor to The Mantle Lamp Company of America, Chicago, 111., a corporation of Illinois Application December 17, 1945, Serial No. 635,561

Claims. 1

The invention includes an improved construction of mantle mounting for supporting inverted incandescent mantles for use in lamps and lanterns of any kind employing a gaseous mixture as fuel, whether produced from liquid hydrocarbon or otherwise. The invention also includes a burner head to be supported on the lower end of the mixing tube of the lamp or lantern, which burner head has in its lower portion a bore for receiving the upper portion of the mantle mounting, which mantle mounting at its upper portion has the general conformation of the bore in the burner head, but is preferably spaced radially a small amount from said bore, so that the upper portion of the mantle mounting is not in contact with said bore. The burner head is provided pref erably at the lower end of its said bore, with an annular seat substantially perpendicular to the axis of the burner head, which seat is of small extent radially for engagement with a corresponding seating surface on the mantle mounting, when the mantle mounting is held in its fully raised position relatively to the burner head. The annular seat carried by the burner head and the corresponding seating surface carried by the mantle mounting, provide a tight seal against the flow of fuel mixture between the burner head and the mantle mounting when the device is in use in a lamp or lantern, which prevents the undesirable flow of fuel mixture to the outside of the mantle with the loss in efficiency attending any such leakage, and also prevents the undesirable effect of burning the fuel mixture outside of the mantle.

The spacing of the upper portion of the mantle mounting from the bore in the burner head prevents adhesion between these parts resulting from the corrosive effects of the high temperature to which the parts are subjected in use, and also resulting from minute deposits of solid particles that may result from burning the fuel. The annular seat carried by the burner head, is preferably in the form of an annular lip of small crosssection extending downwardly from the adjacent portion of the burner head, which limits the engagement between the annular seat and the seating surface of the mantle mounting, to line engagement, or substantially so.

The invention also provides a structure for centering the mantle mounting in the bore in the burner head, which preferably comprises a short tubular extension from the burner head below its said annular seat, the inner diameter of said tubular extension being a loose fit on' a corresponding portion of the mantle mounting, so that the radial relation between said tubular extension and the mantle mounting will maintain the spaced relation above referred to between the upper portion of the mantle mounting and the bore in the burner head. Below the burner head, the mantle mounting is preferably provided with a grooved conformation to support an inverted mantle by a tie-cord or wire or any other suitable means, and at its lower end the mantle mounting is preferably provided with a screen extending across it to reduce to a minimum any tendency of the fuel mixture to back-fire through the burner head.

In addition to the structure described, the invention provides suitable holding devices between the burner head and the mantle mounting, by which the mantle mounting is firmly held in place with its seating surface in engagement with the annular seat on the burner head, so that leakage of fuel mixture between the burner head and the mantle mounting is avoided, and that at the same time the mantle carried by the mantle mounting is positively supported in proper position for use. The holding devices employed may have any desired form, and as illustrated in the drawings, said devices comprise pins carried by the burner head and projecting inwardly from its said bore to engage cooperating slots in the upper portion of the mantle mounting.

In the preferred embodiment of the invention, the upper portion of the mantle mounting is frusto-conical and diverging downwardly, and the bore in the burner head is similarly formed, so that although the upper portion of the mantle mounting is located near the bore in the burner head, it is at the same time substantially spaced from said bore to avoid adhesion between said parts. In the preferred embodiment of the invention illustrated in the drawings, the slots in the upper portion of the mantle mounting are preferably of the .bayonet joint variety, each of said slots including an axially extending portion for receiving the inner end of the corresponding pin carried by the burner head, in registering the slots in the mantle mounting with the pins in the burner head, each of said slots further including a circumferential portion at a small angle to a horizontal plane, so that a small angular movement of the mantle mounting after registry of its slots with the said-pins, will raise the mantle mounting and press its seating surface into firm engagement with the annular seat carried by the burner head, and securely hold the mantle mounting in that position. It is preferable that the mantle mounting shall be made of thin sheet metal or alloy to conserve material and to reduce heat conduction to the burner head to a minimum. The frusto-conical form of the upper portion of the mantle mounting permits the axial portions of the slots to be closed at their upper ends, since the radial distance between the upper ends of the said axial portions is substantially less than the radial distance between the ends of the corresponding pins in the burner head, which permits the pins to enter the axial portions of the mantle mounting slots, in registering the mantle mount iaesaies 3 ing with the burner head in proper position to effect the holding of theimantle' mounting in place by means "of-*=said pins. Other "constructions of devices for holding the mantle mounting in the burner head may be used, if preferred, as below described.

Ihe present invention is the result of many 'years of practical manufacturing experience in inaking mantle mountings' 'and burnerheads, and it includes a mantle mounting,'which provides a tubular structure of thin sheet metal having a grooved lower portion facilitating the factory application in a proper manner of an incandescent inverted mantle, and having an upper portion constructed as above described.

The conical form or the mantleimounting also alias-theadvantage of gradually and uniformly xexpanding the fuel 'mixture as it passes through -thelupper-portion of the-"mantle mounting, with- 'out turbulence and undesirable eddying currents, at the" same time correspondingly decreasing the velocity of flow of the mixture, so that the fuel riixture-isdelivered iromthe mantle mounting and-f to thefiame in the mantle below the mantle mounting, 1 in uniformly distributed condition Ithroug'hout the stream of discharged fuel mixtureandat the' uniform velocity throughout said stream .th'at'zisi'required to produce the size and :AshapeL-ofithe-fiame needed to effectively and uniiormlylincandesce all parts of the mantle.

:Theipresenttinventionuis an improvement on ithe invention disclosed-inPatent NO.-2,023,467 --3granted2December410,1935. The present invenltion'retains all of the advantages of said prior inventiomrand at'tthesame time avoids its dis- 5 tightly against the burner head and thus produce seal 'between the mantle amounting and the -burner head; including-the structure of the parts and their relationship specifically described below and. all equivalent modifications thereof producingsubstantially the same result, said mantle mounting also being provided with means for so raising said mantle mounting relatively to the burnerhead, which raising means includes the tively to the burnerr'headlpresses a portion of. the mantle 'mountingitightly against a seating suriaceof theburnerhead to produce aseal bev tweenthe mantle mounting and the burner head, regardless :of theispecific structure and location not: iparts involved in sodoing.

It is the object of the invention to produce a :mantlef mounting having the construction, operration and advantages described, also the combination .of .such' a mantle mounting and assembled mantle, and also the combination of such a mantle .mounting with a burner head constructed as described to cooperate therewith; for the disclosed inventionsis regarded as including said improved mantle mounting," said mounting and mantle assembly, and also said combination of mantle pendicular to'the axis fof the'mantle mountingggm =to cooperate'with a.COIIBSPOHdiIIg -SLHTEWG oi the burner lread theicentering of the mantlemountring: in the'bore being'effectedwby' a short tubular extension from the burner head-around the pormounting and burner head.

My invention'will be best understood by reference to the accompanying drawings illustrating a preferred embodiment thereof, as well as mod- "ified forms'of said'holding devices, in Which- .Fig. lshowsin front elevation a burner head and. mantle mounting inaccordancewith my in- -vention and in assembled relation,

--Fig. 2 shows in side elevation to an enlarged scale and partially in vertical, sectional View, the

hpreferred mantle-mounting illustrated in Fig. l,

wtions ofthezmantle mounting of largest diameter -without "requiringthe zmantle mounting to be .larger axially. thanwould be required if the centereing 'iunotiomwere:ahsent; andsecond, by making the :portion of l the "mantle mounting within ther borel-in the:iburner head solely for. supporte ese .1-;ing-,,purposes for thevmantle mounting, and by so --spacing-thesaid i upperportion of themantle .-mountingfrom the bore=in the burners head that seriousadhesion betweenthe parts due to heating -=and-rcorrosion,"cannot 'occur. -In additionytheg y .;present-: invention provides the further advantages-dueto the conical-form of-the upper portion of thamantle-mounting, that a'simple form so pin andslotsupporting connection maybe em- -ployed-without the extension of the slots through .--the-upper. end of themantle mounting and therebywealrening it,iand that the expansion of'the fuell mixture is uniformly effected, thereby most :eiii'ciently producing uniformly distributed in- -.candescence. of the. mantle.

.Theinvention is generically regarded as includ- =-ing.-.a :mounting preferably of sheet metal, "for --location:;in-theinterior of a burner. head to support -anuinvertedincandescent mantle, which mantle mounting. is provided at its lower end por- -tion with :means for' the attachment of such a mantla an'd is-alsoprovided above" said attach- .wment'means-withvan annular seating portion for e en-gagement withi'the burnerihead v by raising the mantle mounting to press said .seating portion .in Fig. l,- and shows the, preferred form of the invention,

"Fig. dis a vertical, sectional'view'through the burner: head illustrated in-Fig. '4, taken along the 1ine'5-5 in Fig. 4,

Bshows in a view similar to Fig-4 a modifiediform 'of devices for holding the mantle mounting inplace-in the burner head,

Fig. 7 shows in a view similar to Fig. 4 a furthenmodified form of devices for holding the mantle-mountingin'the burner head, and

wFig. 8 shows in plan; view the mantle mounting illustrated in Fig. 7, this :view of the mantle --mounting :being taken along the line 8-8 in I Fig. '7.

Similar numerals -rref-er to similar parts throughoutthe several views.

-As shown in l ignl, vtheinvention" includes a burner head I supported on'the lower end of a mixing tube i2,'the burner head having mounted units-lower portion, a mantle mounting 3 provided with a circumferential groove 4'for receiving abinding cord orwire'used to secure thexupper endofan inverted incandescent mantle 5, to said mantle mounting. The mantle 5 may be 'of any kind susceptible ofuse as an inverted incandescent mantle and is shown merely for illustrativepurposes.

low, .the groove 4, the lower end portion of the mounting 3 is formed to engage and support a wire'screen 9 across the discharge end of the mantlemounting, by pressing the end of the mounting inwardly and upwardly against the screen to hold the latter against theinner surface of a wall of the groove 4.

As shown in Fig.4, the burner head I is provided in its lower portion with a frusto-conical bore Ill diverging downwardly and terminating in anannular lip II substantially perpendicular'to the axis of the burner head I, said lip constituting an annular seat for engagement with the seating portion- 'l' of the mantle mounting 3. Below the lip II, the burner head I is provided with a short tubular extension I2, having an inner diameter which fits easily around the portion 8 of the mantle mounting. The frusto-conical upper portion 6 of the mantle mounting is of substantially the same angle as the frustoconical bore I0 and also diverges downwardly, and as shown, the seating portion 1 of said mantle mounting is in sealing engagement with the annular lip II. The parts described are so proportioned that the relation between the cylindrical portion 8 and the tubular extension I2, maintains a substantial spacing I3 between the bore I0 and the portion 6 of the mantle mounting, so that the use of the structure will not result in adhesion between the bore I0 and the mantle mounting portion 6, the conical form of the portion 6 at the same time providing for the progressive expansion laterally of the fuel mix-.

ture as it moves through the mantle mounting so that saidmixture is uniformly distributed when it reaches the screen 9 and with a minimum of retardation to its flow.

As more clearly shown in Fig. 5, the burner head I is provided with pins I4 substantially perpendicular to the bore I0 and extending inwardly towards each other a short distance inside of said bore. As shown, two of said pins I4 are employed which are diametrically opposite each other in said bore, although a larger number of pins may be so used if preferred. The frusto-conical portion 6 of the mantle mounting is provided with slots I5 for receiving the inner ends of the pins I4, each of said slots including an axial-portion I6 continuing at its lower end into a circumferential portion H, the latter portion being inclined a small amount to a plane perpendicular to the axis of the mantle mounting, so that the portions I6 of said slots may serve as a means for registering the slots with the inner ends of the pins I4, and that the portions I! of said slots may serve by a small angular movement of the mantle mounting, to raise the mantle mounting upwardl and hold it with its seating portion 1 firmly pressed against the annular lip or seat I I. It will be noted that the axial portions I6 of the slots I5 are closed at their upper ends, thereby imparting stiffness to the upper portion of the mantle mounting. The tapered formation of the upper portion of the mantle mounting permits the entry of the inner ends of the pins it into the axial portions I6 of the slots I5, quite as effectively as though the said aXial portions I6 of said slots opened through the upper end of the mantle mounting.

As shown in Figs. 2, 3 and 4, the frusto-conical portion 6 of the mantle mounting 3, is preferably provided with opposite tongues 6a, made by slitting the upper edge portion of the mantle mounting, which tongues are bent outwardly at their uppper ends to have end engagement with the bore in the burner head, so that when. the mantle mounting is pressed upwardly in said bore to engage the pins 14 in the portions I! of the slots IS, the upper ends of the tongues 6a press outwardly with substantial pressure and frictional engagement against the surface of said bore, to prevent turning movement of the mantle mounting in said bore unless the mantle mounting is positively turned relatively to the burner head. In this manner, accidental separation of the mantle mounting from the burner head is avoided as long as the pins I4 are in the portions I! of the slots I5. This action of the tongues 6a also tends to center the mantle mounting in the bore in the burner head.

A modified construction of the invention is illustrated in Fig. 6, in which the burner head-i8 is provided with a bore I9 which is cylindrical, the upper portion 20 of the mantle mounting 2i being cylindrical and tubular andsubstantially spaced as indicated at 22 from the bore I9 to avoid adhesion between the mantle mounting and said bore. The burner head It is provided at the lower portion of its bore HQ, with an annular seat substantially perpendicular to the axis of the burner head I8, in the form of an annular lip 23.for engaging the upper seating surface of an annular seating portion 24 of the mantle mounting, extending outwardly from the lower end of the tubular portion 29, substantially perpendicular to the axis of the mantle mounting. The burner head i8 is provided below the annular lip 23 with a short tubular extension 25 which is a loose fit around a corresponding portion 26 of the mantle mounting, the mantle mounting 28 being provided with a mantle supporting groove 27 and screen 28 as and for the purposes above described. With the construction of Fig. 6, the mantle mounting is held in the burner head by pins 29 carried by the head I8 and extending into the bore I9, engaging bayonet slots 30 in the portion 2c of the mantle mounting. In this case, however, because of the cylindrical form of the portion 20, the slots 30 open through the upper end of the mantle mounting. The con struction illustrated in Fig. 6 operates in the same manner as the construction illustrated in Fig. 4, in avoiding adhesion between the upper portion of the mantle mounting and the bore in the burner head, and it also effectively seals the annular lip 23 against a corresponding seating surface of the mantle mounting in substantially the manner and for the purposes described in connection with Fig. 4.

In the modified construction shown in Figs. 7 and 8, the burner head I and pins I4 are the same as shown and described in connection with Figs. 4 and 5, the difference being in the construction of the mantle mounting. The mantle mounting 3| shown in Figs. '7 and 8 is of the same general form as the mantle mounting 3 and has the same relation to the burner head I as described in connection with Fig. 4, the diiierence being the structure employed to cooperate with the inner ends of the -pins' ML? The uppeii portioni 32 of: the mantle mounting-is frusto-oonical Iand-Ldivergin'g downwardly: and substantially spaced: from the: bore l0 asabove describedgand saidxmantle mounting is provided with an annular. seating: portion 33.1'and: tubular" portion-34: having the semerelation to. the annularlip H and to. the.

tubular: extension II as above v1 described-for the;

structure shown in FigAh The mantlemountinga EH1 isqprovided'. in. its. upper. conical portion 32', with axial; grooves 35' beginning at the'upper end of themantlem-ounting, for engaging? the-inner ends of the pins' M, said grooves. at their lower. endscontinuing through the" wall of: the mantle mounting in the formof slotsiforreceiving the inner ends of the pins 84. lfhe material of-the mantle mounting 3| isformed at-sa-idslots, into inwardly extending spring tongues: 38: ressing against the upper edges of the inner ends oil the pins M when :the mantlemountingis seated against the annular lip H; which-spring tongues press. the mantle mounting upwardly in the burner head-and thus hold the mantlemounting in place and support the mantle attached to the'mantle'mountingiinposition for use. When it is necessary to remove the mantle mounting: 3|, all that is required'is to exert a downward axial thrust on the mantle mounting to move the spring tongues 36 over the inner ends of the pins 14 and the mantle mounting is-thereby released from the burner head I. v

The constructions described provide for the ready and proper connection of the mantle mounting' with the burner head with" a minimum of effort and thought on the part of the user, and they also provide for as readily removing a used mantle mounting without adhesion and binding with-the burner head for replacement purposes, thus greatly facilitating the practice where desired, of incorporating the mantle mounting in the mantle assembly, and thereby insuring. the "use ofia new and uncorrodedmantle mounting :andscreen with each new mantle.

While I have shown my invention in the particular embodiment above described, I do not limit myself thereto as I may employ equivalents thereof without departing from the scopeof the appended claims.

c Having thus described my invention, what I claim is: v y

1i Means for supporting, an inverted incandescent mantle on a burnerhead having an upward- 1y converging conical bore inits lower portion and an annular seat extending outwardly from the lower end of saidbore and having locking pins extending into said bore, which mantle sup-' porting means is characterizedby and comprises a, mantle mounting" of sheetv metal having an upperportion of a shape corresponding to said. boreand also having at the lower end of its upper' portion an outwardly extending annular portion for engagingsaid seat, the upper portion of said mantle mounting having locking slots for engaging saidpins to hold said mantle mounting'in tight engagement with saidseatil 2; Means for'supporting an inverted incandescent mantle on a burner head having-anupwardly converging conical bore in its lower portion and'a-n annular seat extending outwardly from the lower end of said bore and having'locking pins extending into said bore, which mantle supporting means is characterized by and comprises a. mantle mounting. of sheet metal having an upper portion or" a shape corresponding to said bore and a-lso liavingat: the lowerend of its-. iipper portion-an outwardly extending annular portionz forengaging'saidseat; the upperportion. of said' mantle mounting having locking slots for. en-- gaging said pins-to hold saidmantle mounting iim tight engagement with said seat; the upperrpore tion of said mantle mounting being somewhat. smaller laterally than said bore to leave azsmall clearance space between said upper portion and: said bore.

3: Means-for supporting aninverted incandese cent mantl'eon a burner 'head having arr-upward ly converging conical'bore in its lower portion and an annular seat extending outwardly. from the lowerend of said here and having. lockingfpin's extending into'said bore, said burner head'flalsor having a tubular extension projecting downward 1y from the outer edge ofsaidseat, which mantle supporting means ischaracterized" by" and: comprises a mantle mounting of sheet metal having an upper portionof a shape correspondingto said bore and also having at the lower'end' of: its upper portion an outwardly extending annular'porti'oni for engaging said seat, the upper portion of. said mantle mounting having locking slots for en'- gaging'said pins to'hold said mantle mounting in tight engagement with said seat, the upper portion of saidmantle mounting b'eingisomewhatt smaller laterally than saidboreito leave a small clearance space between said" upper. portion and said bore, said-mantle mounting below; and'ffrom; the outer edge of its said. annular portion, having a,- cylindrical portion of an external diameterrtor fit said tubular extension to-centen said: mantle mounting in said bore.

4.- A sheet metalmounting for location-in the interior of a burner head to supportran inverted incandescent mantle, said mounting including at its lower endportion means-for the attachment. of an incandescent mantle, and above said at.- tachment'means having anannular seatingiportion for engagement with a burner head,"saidi mounting also having a irusto-conical upper-por tion above said seatingportion and converging, upwardly fromsaid seating portion and provided with means for rai'singsaid seatingportion tight-- 1y against the burner head. 1

5. A sheet metal mounting tor' location in the interior of a'burner head t'osupport an invertecl incandescent mantle, said mounting including atits lower end portion means for theattachmentv of an incandescent mantle, and above'said' at tachment' means having an annular seating portion for engagement with a burner head, said mounting also having an upper end porti'on pro-- REFERENCES CITED The following references; are of record in the file 'of this patent: v

UNITED STATES PATENTS Number Name Date- 861,461 Hanson July 30f; I907 1,123,382 Rocksted-u' Jan; 5;,1'915 v 1;475;o50'

Cleary Nov; 201 1923 

